I think this is the latest driver: 
  http://www.nvidia.com/object/linux_display_ia32_1.0-5336.html
But, I think the latest is not cool for all cards.  
I use use Version: 1.0-4496 for the quad4's, and 1.0-4510 on nforce cards.
Compatibility bugs with programs you use will help determine which driver to use.
These are the Archives of drivers:
  http://www.nvidia.com/object/linux_display_archive.html

-----------------------------------
BEGIN config /etc/X11/XF86Config-4
-----------------------------------

Section "ServerLayout"
        Identifier     "Anaconda Configured"
        Screen      0  "Screen0" 0 0
        InputDevice    "Mouse0" "CorePointer"
        InputDevice    "Keyboard0" "CoreKeyboard"
#       InputDevice    "Mouse1" "SendCoreEvents"        # Second mouse (USB).
#       InputDevice    "stylus1"        # Wacom stylus 1.
#       InputDevice    "eraser1"        # Wacom eraser 1.
EndSection

Section "Files"

# The location of the RGB database.  Note, this is the name of the
# file minus the extension (like ".txt" or ".db").  There is normally
# no need to change the default.

    RgbPath     "/usr/X11R6/lib/X11/rgb"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, Red Hat 6.0 and later now use a font server independent of
# the X server to render fonts.

    FontPath   "unix/:7100"

EndSection

Section "Module"
        Load  "dbe"
        Load  "extmod"
        Load  "fbdevhw"
        Load  "glx"
        Load  "record"
        Load  "xie"
        Load  "type1"
        Load  "xtt"
#       Load  "wacom"   # Load the Wacom module.
EndSection

Section "InputDevice"
        Identifier  "Keyboard0"
        Driver      "keyboard"

#       Option  "AutoRepeat"    "500 5"

# when using XQUEUE, comment out the above line, and uncomment the
# following line
#       Option  "Protocol"      "Xqueue"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
#       Option  "Xleds"         "1 2 3"

# To disable the XKEYBOARD extension, uncomment XkbDisable.
#       Option  "XkbDisable"

# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults).  For example, for a non-U.S.
# keyboard, you will probably want to use:
#       Option  "XkbModel"      "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
#       Option  "XkbModel"      "microsoft"
#
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
#       Option  "XkbLayout"     "de"
# or:
#       Option  "XkbLayout"     "de"
#       Option  "XkbVariant"    "nodeadkeys"
#
# If you'd like to switch the positions of your capslock and
# control keys, use:
#       Option  "XkbOptions"    "ctrl:nocaps"
        Option  "XkbRules"      "xfree86"
        Option  "XkbModel"      "pc105"
        Option  "XkbLayout"     "us"
        #Option "XkbVariant"    ""
        #Option "XkbOptions"    ""
EndSection

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "PS/2"
        Option      "Device" "/dev/psaux"
        Option      "ZAxisMapping" "4 5"
        Option      "Emulate3Buttons" "no"
EndSection

#Section "InputDevice"
#        Identifier  "Mouse1"
#        Driver      "mouse"
#        Option      "Protocol" "IMPS/2"
#        Option      "Device" "/dev/input/mice"
#        Option      "ZAxisMapping" "4 5"
#        Option      "Emulate3Buttons" "no"
#EndSection

#Section "InputDevice"
#       Identifier      "stylus1"
#       Driver          "wacom"
#       Option          "Type"          "stylus"
#       Option          "Device"        "/dev/ttyS1"
#       Option          "USB"           "on"    # USB only
#       Option          "Mode"          "Absolute"
#       Option          "Tilt"          "on"
#       Option          "AlwaysCore"    "on"
#       Option          "Threshold"     "5"     # Intuos and Graphire only.
#EndSection

#Section "InputDevice"
#       Identifier      "eraser1"
#       Driver          "wacom"
#       Option          "Type"          "eraser"
#       Option          "Device"        "/dev/ttyS1"
#       Option          "USB"           "on"    # USB only
#       Option          "Mode"          "Absolute"
#       Option          "Tilt"          "on"
#       Option          "AlwaysCore"    "on"
#       Option          "Threshold"     "5"     # Intuos and Graphire only.
#EndSection

Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "Monitor Model"
        HorizSync   31.0-80.0
        VertRefresh 56.0-76.0
EndSection

Section "Device"
        # no known options
        Identifier   "NV AGP"
        Driver       "nvidia"
        VendorName   "nVidia"
        BoardName    "NVIDIA Quadro 4"
        BusID        "PCI:1:0:0"
        Option  "TwinView"
        Option  "SecondMonitorHorizSync"        "31.0-80.0"
        Option  "SecondMonitorVertRefresh"      "56.0-76.0"
        Option  "MetaModes"     "1280x1024,1280x1024"
        Option  "TwinViewOrientation"   "RightOf"
EndSection

Section "Screen"
        Identifier   "Screen0"
        Device       "NV AGP"
        Monitor      "Monitor0"
        DefaultDepth    24

        Subsection "Display"
                Depth       24
                Modes       "1280x1024"
        EndSubsection

EndSection
-----------------------------------
END config /etc/X11/XF86Config-4
-----------------------------------
-----------------------------------
BEGIN config /etc/X11/xsrirc
-----------------------------------
xsri alias  --redhat-login   \
    --color #5477A0 \
    --emblem /usr/share/pixmaps/redhat/redhat-transparent.png \
    --geometry +10+10  --keep-aspect --avoid 320x250 --scale-width=100
--scale-height=30

xsri alias  --ilm-login   \
    --color #000000 \
    --emblem /etc/X11/ilm.login.png \
    --scale-width=100 --scale-height=100 --center-x --center-y
-----------------------------------
END config /etc/X11/xsrirc
-----------------------------------